Britain's Prince William, the Duke of Cambridge, and his wife Catherine, the Duchess of Cambridge, arrive to attend the Tusk Conservation Awards at The Royal Society in London, September 12, 2013. ... more&nbsp

Britain's Prince William, the Duke of Cambridge, and his wife Catherine, the Duchess of Cambridge, arrive to attend the Tusk Conservation Awards at The Royal Society in London, September 12, 2013. REUTERS/Toby Melville (BRITAIN - Tags: ROYALS ENTERTAINMENT) less&nbsp